Electrochemical Oxidation of Adenine on Graphene-Platinum Nanoparticles Modified Electrode

摘要

Nanocomposite based on graphene and platinum nanoparticles was prepared by Radio Frequency catalytic Chemical Vapour Deposition (RF-cCVD) method over a Pt_x/MgO catalytic system (x=l wt.%). This composite was used for modification of a platinum electrode, and next employed to investigate the electrochemical behaviour of adenine by Linear Sweep Voltammetry (LCV). The results showed that the modified electrode had a good electro-catalytic activity towards the oxidation of adenine. The electrochemical characteristics of the modified electrode were also investigated by Electrochemical Impedance Spectroscopy (EIS). A theoretical model was developed based on an electrical equivalent circuit which contained: the solution resistance (R_s), the charge transfer resistance (R_(ct)), the Warburg impedance (Z_w) and the double layer capacitance (C_(dl)).